Added cart functionality

controllers/cart.js

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+'use strict';
+var Product = require('../models/productModel');
+
+module.exports = function (server) {
+
+    /**
+     * Display the shopping cart
+     */
+    server.get('/cart', function (req, res) {
+
+        //Retrieve the shopping cart from memory
+        var cart = req.session.cart,
+            displayCart = {items: [], total: 0},
+            total = 0;
+
+        if (!cart) {
+            res.render('result', {result: 'Your cart is empty!'});
+            return;
+        }
+
+        //Ready the products for display
+        for (var item in cart) {
+            displayCart.items.push(cart[item]);
+            total += (cart[item].qty * cart[item].price);
+        }
+        req.session.total = displayCart.total = total.toFixed(2);
+
+        var model =
+        {
+            cart: displayCart
+        };
+
+        res.render('cart', model);
+    });
+
+    /**
+     * Add an item to the shopping cart
+     */
+    server.post('/cart', function (req, res) {
+
+        //Load (or initialize) the cart
+        req.session.cart = req.session.cart || {};
+        var cart = req.session.cart;
+
+        //Read the incoming product data
+        var id = req.param('item_id');
+
+        //Locate the product to be added
+        Product.findById(id, function (err, prod) {
+            if (err) {
+                console.log('Error adding product to cart: ', err);
+                res.redirect('/cart');
+                return;
+            }
+
+            //Add or increase the product quantity in the shopping cart.
+            if (cart[id]) {
+                cart[id].qty++;
+            }
+            else {
+                cart[id] = {
+                    name: prod.name,
+                    price: prod.price,
+                    prettyPrice: prod.prettyPrice(),
+                    qty: 1
+                };
+            }
+
+            res.redirect('/cart');
+
+        });
+    });
+};

locales/US/en/cart.properties

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+index.greeting=Hello, {name}!

public/templates/cart.dust

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+{>"layouts/master" /}
+
+{<body}
+    <main role="main">
+        <div class="products mb2">
+            <h2>Your cart </h2>
+            <ul class="nm-np inline">
+                {#cart.items}
+                    <li>
+                        <h3 class="nm-np">{.qty} x {.name}</h3>
+                        <h4 class="nm-np">Price: {.prettyPrice} ea.</h4>
+                    </li>
+                {/cart.items}
+            </ul>
+        </div>
+
+        <div class="ccForm inline">
+            <h3>Total: ${cart.total}</h3>
+            <fieldset>
+                <form method="post" action="/pay">
+                    <input name="cc" placeholder="CC #" value="4532649989162709" maxlength="16"><br>
+                    <input name="expMonth" placeholder="MM" value="12" maxlength="2" size="2">
+                    <input name="expYear" placeholder="YYYY" value="2018" maxlength="4" size="4">
+                    <input name="cvv" placeholder="cvv" value="111" maxlength="4" size="4"><br>
+                    <input name="firstName" value="Ash" placeholder="First Name">
+                    <input name="lastName" value="Williams" placeholder="Last Name"><br>
+                    <input type="hidden" name="_csrf" value="{_csrf}">
+                    <input type="submit" value="Complete Purchase">
+                </form>
+            </fieldset>
+        </div>
+        <div>
+            <p>
+                Note:<br>
+                The above values have been pre-filled for your convenience<br>
+                You can use any valid Amex, Visa, MC or Discover credit card number
+                (<a target="_blank" href="http://www.darkcoding.net/credit-card-numbers/">Random Generator</a>)<br>
+                along with any cvv and expiration date in the future.
+
+
+            </p>
+        </div>
+    </main>
+{/body}